Question

Given that a=5 ,d=3, a n=50 find n

Answer 1

Answer:

n = 10

Step-by-step explanation:

an = 50

5×n=50

n=50/5

n = 10

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Answer 2

Given first term (a) = 5 , common difference(d) = 3

last term (n) = 50

last term of an AP = a + (n-1)d , where n is no of terms

=> a + (n-1)d = 50

=> 5 + (n-1)3 = 50

=> (n-1)3 = 45

=> (n-1) = 15

=> n = 14